.signature-section {
    padding: 16px;
    margin: 16px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  .signature-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  
  .canvas-container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
  }
  
  .controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 12px;
    background: #f5f5f5;
    border-radius: 4px;
  }
  
  .control-group {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  
  .button-group {
    display: flex;
    gap: 8px;
    margin-top: 8px;
  }
  
  .signature-preview {
    margin-top: 16px;
  }
  
  .preview-box {
    background: #f5f5f5;
    padding: 8px;
    border-radius: 4px;
    min-height: 100px;
  }
  
  /* 确保按钮在移动设备上有足够的点击区域 */
  .button-group .adm-button {
    min-width: 80px;
    height: 40px;
  }
  
  /* 防止触摸设备上的滚动干扰 */
  .canvas-container {
    touch-action: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
  }